Answers: 1
Biology, 22.06.2019 13:00
Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?
Answers: 1
Biology, 22.06.2019 14:00
The polio virus can cause skeletal muscle paralysis by destroying neuron cell bodies. what area of the spinal cord is destroyed
Answers: 3
Biology, 22.06.2019 18:40
Hey everybody i need with a biology question. all the gametes of isogamous organisms are genetically identical. true false
Answers: 1
How do nitric oxide and sulfur dioxide react with air?...
Biology, 23.07.2019 17:00
Mathematics, 23.07.2019 17:00
History, 23.07.2019 17:00
History, 23.07.2019 17:00
History, 23.07.2019 17:00
Social Studies, 23.07.2019 17:00
History, 23.07.2019 17:00
History, 23.07.2019 17:00
History, 23.07.2019 17:00
Social Studies, 23.07.2019 17:00
Social Studies, 23.07.2019 17:00